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首页> 外文期刊>Crystal growth & design >PH-dependent interpenetrated, polymorphic, Cd~(2+)- and btb-based porous coordination polymers with open metal sites
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PH-dependent interpenetrated, polymorphic, Cd~(2+)- and btb-based porous coordination polymers with open metal sites

机译:具有pH依赖性的互穿多晶Cd〜(2+)和btb基多孔配位聚合物

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摘要

Two polymorphic porous coordination polymers constructed from Cd ~(2+) and benzene-1,3,5-tribenzoate and having interpenetrated two-dimensional (2D) (6,3) net topology and three-dimensional (3D) (10,3)-b net topology structures were synthesized. The number of single honeycomb- type layers interpenetrated dictates the dimensionality of the crystal structures of these two phases. The 2D structure has two interpenetrated layers, whereas the 3D structure has four interpenetrated layers. Interestingly, these two polymorphic forms selectively adsorb CO_2 over N_2, C _2H_4, and C_2H_6. Moreover, diffuse reflectance Fourier-transform infrared spectroscopy of CO_2 adsorbed on these two polymorphic phases indicates strong interaction between CO _2 and the open metal sites present on Cd~(2+) ions.
机译:由Cd〜(2+)和1,3,5-三苯甲酸苯酯构成的两种多晶型多孔配位聚合物,具有互穿的二维(2D)(6,3)网络拓扑和三维(3D)(10,3)合成了-b网络拓扑结构。相互渗透的单个蜂窝型层的数量决定了这两个相的晶体结构的尺寸。 2D结构具有两个互穿的层,而3D结构具有四个互穿的层。有趣的是,这两种多晶型形式选择性地在N_2,C_2H_4和C_2H_6上吸附CO_2。此外,在这两个多态相上吸附的CO_2的漫反射傅里叶变换红外光谱表明,CO_2与Cd〜(2+)离子上存在的开放金属位点之间存在强相互作用。

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